I know that 416 will get up to around 46Rc if you mix it in with a batch off 440C, grind a blade out of it by mistake and send it off to Peters' for HT. I imagine that would improve both the scratch-resistance and corrosion resistance.
I'm told 304 is better for both scratch and wear resistance, but as others saiid it's more difficult to work with and engravers often won't work on it. I guess the choice between the two depends if the knife is going to be a safe- or pocket-queen, or going to be used a lot.